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STI ATV Tires from Rocky Mountain ATV/MC

STI is dedicated to the design, development and manufacturing of high quality ATV and UTV tires. Their engineers are committed to developing tires that meet the highest standards and provide the greatest value to their customers. Rocky Mountain ATV/MC has many kinds of STI ATV tires, made for sand, snow, mud, tracks and trails. You can be sure any tire that Rocky Mountain ATV/MC sells is durable and built to last, but we also strive to provide incredible prices as well.

If you need two STI ATV tires, make sure you check out our ATV Tire and Wheel Builder Package which can save you up to 56%. Simply choose two tires and wheels using our filters search that will find the tires to fit your machine perfectly. Then our trained professionals will mount them for free and get them ready to be shipped along with the free valve stems you receive with your package. In addition, you also receive free ground shipping with any ATV Tire and Wheel Package.

Latest STI ATV Tires Reviews – You could win up to $500 for reviewing products!

  • STI Tech 4 XC ATV Tire

    STI Tech 4 XC ATV Tire

    Rachel in GA

    Very good quality

    Tires are you might expect for a much higher priced tire.

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  • STI Roctane XD Radial ATV Tire

    STI Roctane XD Radial ATV Tire

    James in VA

    Unsure of STI's Quality Standards

    This is my second set of Roctanes. The first was for a Cam Am Outlander, the second for a Maverick. The Good- great looking tire with aggressive tread design. They perform great on rocky and muddy trails like those found on the Hatfield and McCoy trails. I never lose grip in any situation, which wasn't true with stock Can Am tires. The Not So Good- Roctanes don't consistently hold tire pressure. Two of the four tires on my Outlander lost air at the bead. After 1-2 days in the garage, they'd be flat. On the trails, they'd loose half their air after a day of riding. The new set I just bought in September is doing the same. This most recent set visibly doesn't look plum to the rim of the STI rim they are mounted on. Both of the 8 inch wide tires on the front lose their air. After two sets of these things have leaked on me, coupled with a friend who has had the same experience, I wonder if they aren't manufactured to a tight size tolerance. If you put a bottle of Slime into each tire, the bead leaks stop. But it is annoying to have to put a $12 can of stop leak into a new tire that cost over $100. Bottom line is that if you are going to ride Roctanes, bring a portable air compressor.

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  • STI Black Diamond XTR Radial ATV Tire

    STI Black Diamond XTR Radial ATV Tire

    TIM in NJ


    purchased these to go on my scrambler 850. ordered them on a set of sti hd3 wheels. i went with 26x11x14 in the rear and 26x9x14 in the front. even with the same size tires the quad sits a little higher up and is a huge improvement from the terrible stock tires. tires looked awesome and came quick but on the first ride they made it about 10 min before the side wall sliced in two places. I've never had a 6 ply tire rip so easily

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  • STI Outback AT ATV Tire

    STI Outback AT ATV Tire

    Greg in ID


    Great tires, I am very happy with the product

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  • STI Outback Max ATV Tire

    STI Outback Max ATV Tire

    BRIAN in LA

    great mud tire

    Very smooth on hard surfaces and a great mud tire

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  • STI Black Diamond ATR Radial ATV Tire

    STI Black Diamond ATR Radial ATV Tire

    Austin in MO

    Very Happy With These

    I am quite happy with these tires. You can't beat them for the price. You won't find a 6 ply radial for 60 dollars anywhere else. They have good all around traction. Not great in deep mud, but it's not a mud terrain tire either.

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